Tie-plate.



J. LUNDIE.

TIE PLATE.

APPLICATION FILED SEPT. 14, 1912.

Patented June 24, 1913.

John Zandz'e 5 Mue M'oz uNiTED s'ra'ras arana carton.

JOHN LUNDIE, on NEW YORK, N. Y.

TIE-PLATE.

- To all whom it may concern:

Be it known that 1, JOHN LUNDIE, a citizen of the United States, residing at New York, in the borough of Manhattan, county and State of New York, have invented certain new and useful Improvements in Tie- Plates, of which the following is a specification.

This invention relates to improvements in tie-plates for railroads.

The objects of the invention are to provide a tie-plate which in use will locate all the bearing surfaces in such position as to be normal to the line of the thrust of the wheels or wheel load, and also to provide a tie-plate so constructed as to allow the rail to adjust itself easily under a load without coming in cont act with a sharp angle and which will bite into the tie to prevent the plate from slipping endwise.

Other objects are to prbvide. a durable.v

' practical and efficient tie-plate.

These being among theobjects of my invention, the same consists of certain features of construction and combinations of parts tobe hereinafter described and then pointed out in the claims with reference to the accompanying drawings showing a suitable embodiment of the invention, and in which Figure 1 is a transverse section on the line 1-1, Fig. 3, looking in the direction of the arrow, and showing a spiked rail and tieplate with a fragment of a. wheel passing over the rail; Fig. 2 is a transverse section, illustrating the same partstaken on theline 22 Fig. 3, and looking in the direction of the arrow; Fig. 3 is a side elevation of a spiked rail and tie-plate showing afragment of a tie in section. and-Fig. 4 is a perspective view of the preferred construction of tieplate.

Referring to the drawings, the tie 10 Sup ports the tie-plate 11 which in turn supports the rail 12, and 13 indicates a car-wheel. A standard car-wheel is provided with a tread Specification of Letters fatent. Patentgd June 24, 1913, Application filed September 14, 1912. Serial No. 720,345.

transversely for substantially its entire ,width. The lower surface is constructed "with a series of steps, which series extends transversely of the tie-plate, so as to provide bearing surfaces 15, 15, 15 and so on. Said surfaces are stepped relatively to each other and extend longitudinally of the tie-plate as indicated by dotted lines in Fig. 4. The surfaces 15, 15 and 15 or as many bearing surfaces as there are on the underside of the tie-plate, are not only parallel with each.

the individual surfaces are not parallel therewith. The bearing surface 17 of the head of the rail 12 will likewise be parallel with the before-mentioned surfaces 14 and 15, 15 and 15 The tie-plate near one edge is provided with a well-known rail-retaining flange 18, and the plate and rail are secured in position in the usual manner by ,means of spikes such as 19 and 20 which pass through suitable openings in the tie-plate.

The principle of the described constru'ction is more clearly illustrated in Fig. 1. In this figure the vertical is indicated by a, while I) indicates the line of stress which is normal to all bearing surfaces includingthe surface 17 of the rail head, 14.of the tieplate and the stepped surfaces 15, 15 and 15 and so forth at the underside of the tieplate. As compared with a standard wheel, the inclination of the dotted line b to the vertical is 1 in 20. The horizontal is indicated by 0 but the bearing surface 17 cor-- responds with the inclination of the bevel of the car-wheel if it be standard, that is to say, .1 in 20, and this inclination to the horizontal is indicated by d. The series'of stepped surfaces 15, 15, 15 andso forth at the underside of the tie-plate are normal to the line of stress for the purpose of neutralizing the side thrust, due to the beveled bearing of the wheel, which is a valuable feature in connection with the construction described.

surfaces are for the purpose of preventing the breakin of the fibers of the tie such as 10. Such he must obviousl be of yielding material such as wood.

Another highly important feature of the present invention consists in a slight camber of the tie-plate which extends from end 21 to end 22 and which is longitudinal to the line of the track for the purpose of preventing the rail in its deflection under a wheel load from coming in contact with a sharp edge and at the same time decreasing" the span of the rail deflected, while acting in the nature of a continuous beam. Preferably, and for the purpose of cambering the tie-plate, the same is bent up from a metal pla -tn and in such manner that the coir-:exity of the plate is at the upper surface M and corresponds with the extrados of an arch While the inourre is at the lower surface and corresponds with the intrados of an arch. A further advantage of the camber is that it allows a slight bite of the ends 21 and 22 of the plate into the tie it), thus preventing the plate from crawling or slipping endwise in the length of the rail. it will be seen that the rail rests on the convex sunn'ni; of the upper surface 14: so as to produce a more suitable bearing surface than it the summit were angulaig 'antaggc in the present in It further Vention is tha he improved tie-plate produces its own it in the tie.

The plate may be made of steel and bent in a hull-dorm and punched at the same operation, It is clear that the illustrated form of the invention is susceptible of modification, and that I am not limited to details of construction.

Having thus described my invention, what I claim as new is:

1. A tie-plate for railway rails, the same having an upper rail seat normal to the line of thrust of the standard coned tread car-wheel, and lower stepped surfaces parallel with said seat.

2. A tie'plate for railway rails, the same having an upper rail seat normal to the line of thrust of the standard coned tread car-wheel, and lower stepped surfaces parallel with said seat, said surfaces being joined by curves.

A tie-plate for railway rails, the same having an upper rail seat normal to the line of thrust of the standard coned tread car-wheel, and lower stepped surfaces parallel with said seat, said plate having a camher which longitudinal to the line of track.

4-. The combination of a tic-plate having an upper rail seat which is normal to the line of thrust of the standard coned tread car-wheel and lower stepped surfaces parallel with said seat, and an. inclined rail rest-- in; on said seat.

The combination of tie of yielding material having no previously formed seat,

a tie-plate constructed to produce its own seat in said tie by biting into it, and a rail, all of the bearing surfaces of which parts, that is to say said tie-plate and rail, are normal to the line of thrust of a standard coned car-wheel.

JQHN LllNDil l. 

